#include "c.h"
#include <float.h>

static char rcsid[] = "$Id: types.nw,v 2.23 1997/06/27 22:04:06 drh Exp $";

static Field isfield(const char *, Field);
static Type type(int, Type, int, int, void *);

static struct entry {
        struct type type;
        struct entry *link;
} *typetable[128];
static int maxlevel;

static Symbol pointersym;

Type chartype;                  /* char */
Type doubletype;                /* double */
Type floattype;                 /* float */
Type inttype;                   /* signed int */
Type longdouble;                /* long double */
Type longtype;                  /* long */
Type longlongtype;              /* long long */
Type shorttype;                 /* signed short int */
Type signedchar;                /* signed char */
Type unsignedchar;              /* unsigned char */
Type unsignedlong;              /* unsigned long int */
Type unsignedlonglong;          /* unsigned long long int */
Type unsignedshort;             /* unsigned short int */
Type unsignedtype;              /* unsigned int */
Type funcptype;                 /* void (*)() */
Type voidptype;                 /* void* */
Type voidtype;                  /* basic types: void */
Type unsignedptr;               /* unsigned type to hold void* */

static Type xxinit(int op, char *name, Metrics m) {
        Symbol p = install(string(name), &types, GLOBAL, PERM);
        Type ty = type(op, 0, m.size, m.align, p);

        assert(ty->align == 0 || ty->size%ty->align == 0);
        p->type = ty;
        p->addressed = m.outofline;
        switch (ty->op) {
        case INT:
                p->u.limits.max.i = ones(8*ty->size)>>1;
                p->u.limits.min.i = -p->u.limits.max.i - 1;
                break;
        case UNSIGNED:
                p->u.limits.max.i = ones(8*ty->size);
                p->u.limits.min.i = 0;
                break;
        case FLOAT:
                if (ty->size == sizeof (float))
                        p->u.limits.max.d =  FLT_MAX;
                else if (ty->size == sizeof (double))
                        p->u.limits.max.d =  DBL_MAX;
                else
                        p->u.limits.max.d = LDBL_MAX;
                p->u.limits.min.d = -p->u.limits.max.d;
                break;
        default: assert(0);
        }
        return ty;
}
static Type type(int op, Type ty, int size, int align, void *sym) {
        unsigned h = (op^((unsigned long)ty>>3))
&(NELEMS(typetable)-1);
        struct entry *tn;

        if (op != FUNCTION && (op != ARRAY || size > 0))
                for (tn = typetable[h]; tn; tn = tn->link)
		        if (tn->type.op    == op   && tn->type.type  == ty
		        &&  tn->type.size  == size && tn->type.align == align
		        &&  tn->type.u.sym == sym)
		                return &tn->type;
        NEW0(tn, PERM);
        tn->type.op = op;
        tn->type.type = ty;
        tn->type.size = size;
        tn->type.align = align;
        tn->type.u.sym = sym;
        tn->link = typetable[h];
        typetable[h] = tn;
        return &tn->type;
}
void type_init(int argc, char *argv[]) {
        static int inited;

        if (inited)
                return;
        inited = 1;
        if (!IR)
                return;
#define xx(v,name,op,metrics) v=xxinit(op,name,IR->metrics)
	xx(chartype,        "char",              INT,     charmetric);
	xx(doubletype,      "double",            FLOAT,   doublemetric);
	xx(floattype,       "float",             FLOAT,   floatmetric);
	xx(inttype,         "int",               INT,     intmetric);
	xx(longdouble,      "long double",       FLOAT,   longdoublemetric);
	xx(longtype,        "long int",          INT,     longmetric);
	xx(longlongtype,    "long long int",     INT,     longmetric);
	xx(shorttype,       "short",             INT,     shortmetric);
	xx(signedchar,      "signed char",       INT,     charmetric);
	xx(unsignedchar,    "unsigned char",     UNSIGNED,charmetric);
	xx(unsignedlong,    "unsigned long",     UNSIGNED,longmetric);
	xx(unsignedshort,   "unsigned short",    UNSIGNED,shortmetric);
	xx(unsignedtype,    "unsigned int",      UNSIGNED,intmetric);
	xx(unsignedlonglong,"unsigned long long",UNSIGNED,longmetric);
#undef xx
	{
	        Symbol p;
	        p = install(string("void"), &types, GLOBAL, PERM);
	        voidtype = type(VOID, NULL, 0, 0, p);
	        p->type = voidtype;
	}
	pointersym = install(string("T*"), &types, GLOBAL, PERM);
	pointersym->addressed = IR->ptrmetric.outofline;
	pointersym->u.limits.max.p = (void*)ones(8*IR->ptrmetric.size);
	pointersym->u.limits.min.p = 0;
	voidptype = ptr(voidtype);
	funcptype = ptr(func(voidtype, NULL, 1));
	unsignedptr = type(UNSIGNED, NULL, voidptype->size, voidptype->align, voidptype->u.sym);
}
void rmtypes(int lev) {
        if (maxlevel >= lev) {
                int i;
                maxlevel = 0;
                for (i = 0; i < NELEMS(typetable); i++) {
                        struct entry *tn, **tq = &typetable[i];
			while ((tn = *tq) != NULL)
			        if (tn->type.op == FUNCTION)
			                tq = &tn->link;
			        else if (tn->type.u.sym && tn->type.u.sym->scope >= lev)
			                *tq = tn->link;
			        else {
			                if (tn->type.u.sym && tn->type.u.sym->scope > maxlevel)
					        maxlevel = tn->type.u.sym->scope;
			                tq = &tn->link;
			        }

                }
        }
}
Type ptr(Type ty) {
        return type(POINTER, ty, IR->ptrmetric.size,
                IR->ptrmetric.align, pointersym);
}
Type deref(Type ty) {
        if (isptr(ty))
                ty = ty->type;
        else
                error("type error: %s\n", "pointer expected");
        return isenum(ty) ? unqual(ty)->type : ty;
}
Type array(Type ty, int n, int a) {
        assert(ty);
        if (isfunc(ty)) {
                error("illegal type `array of %t'\n", ty);
                return array(inttype, n, 0);
        }
        if (level > GLOBAL && isarray(ty) && ty->size == 0)
                error("missing array size\n");
        if (ty->size == 0) {
                if (unqual(ty) == voidtype)
                        error("illegal type `array of %t'\n", ty);
                else if (Aflag >= 2)
                        warning("declaring type array of %t' is undefined\n", ty);

        } else if (n > INT_MAX/ty->size) {
                error("size of `array of %t' exceeds %d bytes\n",
                        ty, INT_MAX);
                n = 1;
        }
        return type(ARRAY, ty, n*ty->size,
                a ? a : ty->align, NULL);
}
Type atop(Type ty) {
        if (isarray(ty))
                return ptr(ty->type);
        error("type error: %s\n", "array expected");
        return ptr(ty);
}
Type qual(int op, Type ty) {
        if (isarray(ty))
                ty = type(ARRAY, qual(op, ty->type), ty->size,
                        ty->align, NULL);
        else if (isfunc(ty))
                warning("qualified function type ignored\n");
        else if (isconst(ty)    && op == CONST
        ||       isvolatile(ty) && op == VOLATILE)
                error("illegal type `%k %t'\n", op, ty);
        else {
                if (isqual(ty)) {
                        op += ty->op;
                        ty = ty->type;
                }
                ty = type(op, ty, ty->size, ty->align, NULL);
        }
        return ty;
}
Type func(Type ty, Type *proto, int style) {
        if (ty && (isarray(ty) || isfunc(ty)))
                error("illegal return type `%t'\n", ty);
        ty = type(FUNCTION, ty, 0, 0, NULL);
        ty->u.f.proto = proto;
        ty->u.f.oldstyle = style;
        return ty;
}
Type freturn(Type ty) {
        if (isfunc(ty))
                return ty->type;
        error("type error: %s\n", "function expected");
        return inttype;
}
int variadic(Type ty) {
        if (isfunc(ty) && ty->u.f.proto) {
                int i;
                for (i = 0; ty->u.f.proto[i]; i++)
                        ;
                return i > 1 && ty->u.f.proto[i-1] == voidtype;
        }
        return 0;
}
Type newstruct(int op, char *tag) {
        Symbol p;

        assert(tag);
        if (*tag == 0)
                tag = stringd(genlabel(1));
        else
                if ((p = lookup(tag, types)) != NULL && (p->scope == level
		|| p->scope == PARAM && level == PARAM+1)) {
		        if (p->type->op == op && !p->defined)
		                return p->type;
		        error("redefinition of `%s' previously defined at %w\n",
		                p->name, &p->src);
		}
        p = install(tag, &types, level, PERM);
        p->type = type(op, NULL, 0, 0, p);
        if (p->scope > maxlevel)
                maxlevel = p->scope;
        p->src = src;
        return p->type;
}
Field newfield(char *name, Type ty, Type fty) {
        Field p, *q = &ty->u.sym->u.s.flist;

        if (name == NULL)
                name = stringd(genlabel(1));
        for (p = *q; p; q = &p->link, p = *q)
                if (p->name == name)
                        error("duplicate field name `%s' in `%t'\n",
                                name, ty);
        NEW0(p, PERM);
        *q = p;
        p->name = name;
        p->type = fty;
        if (xref) {                                                     /* omit */
                if (ty->u.sym->u.s.ftab == NULL)                        /* omit */
                        ty->u.sym->u.s.ftab = table(NULL, level);       /* omit */
                install(name, &ty->u.sym->u.s.ftab, 0, PERM)->src = src;/* omit */
        }                                                               /* omit */
        return p;
}
int eqtype(Type ty1, Type ty2, int ret) {
        if (ty1 == ty2)
                return 1;
        if (ty1->op != ty2->op)
                return 0;
        switch (ty1->op) {
        case ENUM: case UNION: case STRUCT:
        case UNSIGNED: case INT: case FLOAT:
                return 0;
        case POINTER:  return eqtype(ty1->type, ty2->type, 1);
        case VOLATILE: case CONST+VOLATILE:
        case CONST:    return eqtype(ty1->type, ty2->type, 1);
        case ARRAY:    if (eqtype(ty1->type, ty2->type, 1)) {
		               if (ty1->size == ty2->size)
		                       return 1;
		               if (ty1->size == 0 || ty2->size == 0)
		                       return ret;
		       }
		       return 0;
        case FUNCTION: if (eqtype(ty1->type, ty2->type, 1)) {
		               Type *p1 = ty1->u.f.proto, *p2 = ty2->u.f.proto;
		               if (p1 == p2)
		                       return 1;
		               if (p1 && p2) {
		                       for ( ; *p1 && *p2; p1++, p2++)
				               if (eqtype(unqual(*p1), unqual(*p2), 1) == 0)
				                       return 0;
				       if (*p1 == NULL && *p2 == NULL)
				               return 1;
		               } else {
		                       if (variadic(p1 ? ty1 : ty2))
				               return 0;
				       if (p1 == NULL)
				               p1 = p2;
				       for ( ; *p1; p1++) {
				               Type ty = unqual(*p1);
				               if (promote(ty) != (isenum(ty) ? ty->type : ty))
				                       return 0;
				       }
				       return 1;
		               }
		       }
		       return 0;
        }
        assert(0); return 0;
}
Type promote(Type ty) {
        ty = unqual(ty);
        switch (ty->op) {
        case ENUM:
                return inttype;
        case INT:
                if (ty->size < inttype->size)
                        return inttype;
                break;
        case UNSIGNED:
                if (ty->size < inttype->size)
                        return inttype;
                if (ty->size < unsignedtype->size)
                        return unsignedtype;
                break;
        case FLOAT:
                if (ty->size < doubletype->size)
                        return doubletype;
        }
        return ty;
}
Type signedint(Type ty) {
        if (ty->op == INT)
                return ty;
        assert(ty->op == UNSIGNED);
#define xx(t) if (ty->size == t->size) return t
        xx(inttype);
        xx(longtype);
        xx(longlongtype);
#undef xx
        assert(0); return NULL;
}
Type compose(Type ty1, Type ty2) {
        if (ty1 == ty2)
                return ty1;
        assert(ty1->op == ty2->op);
        switch (ty1->op) {
        case POINTER:
                return ptr(compose(ty1->type, ty2->type));
        case CONST+VOLATILE:
                return qual(CONST, qual(VOLATILE,
                        compose(ty1->type, ty2->type)));
        case CONST: case VOLATILE:
                return qual(ty1->op, compose(ty1->type, ty2->type));
        case ARRAY:    { Type ty = compose(ty1->type, ty2->type);
			 if (ty1->size && ty1->type->size && ty2->size == 0)
			         return array(ty, ty1->size/ty1->type->size, ty1->align);
			 if (ty2->size && ty2->type->size && ty1->size == 0)
			         return array(ty, ty2->size/ty2->type->size, ty2->align);
			 return array(ty, 0, 0);    }
        case FUNCTION: { Type *p1  = ty1->u.f.proto, *p2 = ty2->u.f.proto;
			 Type ty   = compose(ty1->type, ty2->type);
			 List tlist = NULL;
			 if (p1 == NULL && p2 == NULL)
			         return func(ty, NULL, 1);
			 if (p1 && p2 == NULL)
			         return func(ty, p1, ty1->u.f.oldstyle);
			 if (p2 && p1 == NULL)
			         return func(ty, p2, ty2->u.f.oldstyle);
			 for ( ; *p1 && *p2; p1++, p2++) {
			         Type ty = compose(unqual(*p1), unqual(*p2));
			         if (isconst(*p1)    || isconst(*p2))
			                 ty = qual(CONST, ty);
			         if (isvolatile(*p1) || isvolatile(*p2))
			                 ty = qual(VOLATILE, ty);
			         tlist = append(ty, tlist);
			 }
			 assert(*p1 == NULL && *p2 == NULL);
			 return func(ty, ltov(&tlist, PERM), 0); }
        }
        assert(0); return NULL;
}
int ttob(Type ty) {
        switch (ty->op) {
        case CONST: case VOLATILE: case CONST+VOLATILE:
                return ttob(ty->type);
        case VOID: case INT: case UNSIGNED: case FLOAT:
                return ty->op + sizeop(ty->size);
        case POINTER:
                return POINTER + sizeop(voidptype->size);
        case FUNCTION:
                return POINTER + sizeop(funcptype->size);
        case ARRAY: case STRUCT: case UNION:
                return STRUCT;
        case ENUM:
                return INT + sizeop(inttype->size);
        }
        assert(0); return INT;
}
Type btot(int op, int size) {
#define xx(ty) if (size == (ty)->size) return ty;
        switch (optype(op)) {
        case F:
                xx(floattype);
                xx(doubletype);
                xx(longdouble);
                assert(0); return 0;
        case I:
                xx(chartype);
                xx(shorttype);
                xx(inttype);
                xx(longtype);
                xx(longlongtype);
                assert(0); return 0;
        case U:
                xx(unsignedchar);
                xx(unsignedshort);
                xx(unsignedtype);
                xx(unsignedlong);
                xx(unsignedlonglong);
                assert(0); return 0;
        case P:
                xx(voidptype);
                xx(funcptype);
                assert(0); return 0;
        }
#undef xx
        assert(0); return 0;
}
int hasproto(Type ty) {
        if (ty == 0)
                return 1;
        switch (ty->op) {
        case CONST: case VOLATILE: case CONST+VOLATILE: case POINTER:
        case ARRAY:
                return hasproto(ty->type);
        case FUNCTION:
                return hasproto(ty->type) && ty->u.f.proto;
        case STRUCT: case UNION:
        case VOID:   case FLOAT: case ENUM:  case INT: case UNSIGNED:
                return 1;
        }
        assert(0); return 0;
}
/* fieldlist - construct a flat list of fields in type ty */
Field fieldlist(Type ty) {
        return ty->u.sym->u.s.flist;
}

/* fieldref - find field name of type ty, return entry */
Field fieldref(const char *name, Type ty) {
        Field p = isfield(name, unqual(ty)->u.sym->u.s.flist);

        if (p && xref) {
                Symbol q;
                assert(unqual(ty)->u.sym->u.s.ftab);
                q = lookup(name, unqual(ty)->u.sym->u.s.ftab);
                assert(q);
                use(q, src);
        }
        return p;
}

/* ftype - return a function type for rty function (ty,...)' */
Type ftype(Type rty, Type ty) {
        List list = append(ty, NULL);

        list = append(voidtype, list);
        return func(rty, ltov(&list, PERM), 0);
}

/* isfield - if name is a field in flist, return pointer to the field structure */
static Field isfield(const char *name, Field flist) {
        for ( ; flist; flist = flist->link)
                if (flist->name == name)
                        break;
        return flist;
}

/* outtype - output type ty */
void outtype(Type ty, FILE *f) {
        switch (ty->op) {
        case CONST+VOLATILE:
                fprint(f, "%k %k %t", CONST, VOLATILE, ty->type);
                break;
        case CONST: case VOLATILE:
                fprint(f, "%k %t", ty->op, ty->type);
                break;
        case STRUCT: case UNION: case ENUM:
                assert(ty->u.sym);
                if (ty->size == 0)
                        fprint(f, "incomplete ");
                assert(ty->u.sym->name);
                if (*ty->u.sym->name >= '1' && *ty->u.sym->name <= '9') {
                        Symbol p = findtype(ty);
                        if (p == 0)
                                fprint(f, "%k defined at %w", ty->op, &ty->u.sym->src);
                        else
                                fprint(f, p->name);
                } else {
                        fprint(f, "%k %s", ty->op, ty->u.sym->name);
                        if (ty->size == 0)
                                fprint(f, " defined at %w", &ty->u.sym->src);
                }
                break;
        case VOID: case FLOAT: case INT: case UNSIGNED:
                fprint(f, ty->u.sym->name);
                break;
        case POINTER:
                fprint(f, "pointer to %t", ty->type);
                break;
        case FUNCTION:
                fprint(f, "%t function", ty->type);
                if (ty->u.f.proto && ty->u.f.proto[0]) {
                        int i;
                        fprint(f, "(%t", ty->u.f.proto[0]);
                        for (i = 1; ty->u.f.proto[i]; i++)
                                if (ty->u.f.proto[i] == voidtype)
                                        fprint(f, ",...");
                                else
                                        fprint(f, ",%t", ty->u.f.proto[i]);
                        fprint(f, ")");
                } else if (ty->u.f.proto && ty->u.f.proto[0] == 0)
                        fprint(f, "(void)");

                break;
        case ARRAY:
                if (ty->size > 0 && ty->type && ty->type->size > 0) {
                        fprint(f, "array %d", ty->size/ty->type->size);
                        while (ty->type && isarray(ty->type) && ty->type->type->size > 0) {
                                ty = ty->type;
                                fprint(f, ",%d", ty->size/ty->type->size);
                        }
                } else
                        fprint(f, "incomplete array");
                if (ty->type)
                        fprint(f, " of %t", ty->type);
                break;
        default: assert(0);
        }
}

/* printdecl - output a C declaration for symbol p of type ty */
void printdecl(Symbol p, Type ty) {
        switch (p->sclass) {
        case AUTO:
                fprint(stderr, "%s;\n", typestring(ty, p->name));
                break;
        case STATIC: case EXTERN:
                fprint(stderr, "%k %s;\n", p->sclass, typestring(ty, p->name));
                break;
        case TYPEDEF: case ENUM:
                break;
        default: assert(0);
        }
}

/* printproto - output a prototype declaration for function p */
void printproto(Symbol p, Symbol callee[]) {
        if (p->type->u.f.proto)
                printdecl(p, p->type);
        else {
                int i;
                List list = 0;
                if (callee[0] == 0)
                        list = append(voidtype, list);
                else
                        for (i = 0; callee[i]; i++)
                                list = append(callee[i]->type, list);
                printdecl(p, func(freturn(p->type), ltov(&list, PERM), 0));
        }
}

/* prtype - print details of type ty on f with given indent */
static void prtype(Type ty, FILE *f, int indent, unsigned mark) {
        switch (ty->op) {
        default:
                fprint(f, "(%d %d %d [%p])", ty->op, ty->size, ty->align, ty->u.sym);
                break;
        case FLOAT: case INT: case UNSIGNED: case VOID:
                fprint(f, "(%k %d %d [\"%s\"])", ty->op, ty->size, ty->align, ty->u.sym->name);
                break;
        case CONST+VOLATILE:
                fprint(f, "(%s %d %d ", "CONST+VOLATILE", ty->size, ty->align);
                prtype(ty->type, f, indent+1, mark);
                fprint(f, ")");
                break;
        case CONST: case VOLATILE: case POINTER: case ARRAY:
                fprint(f, "(%k %d %d ", ty->op, ty->size, ty->align);
                prtype(ty->type, f, indent+1, mark);
                fprint(f, ")");
                break;
        case STRUCT: case UNION:
                fprint(f, "(%k %d %d [\"%s\"]", ty->op, ty->size, ty->align, ty->u.sym->name);
                if (ty->x.marked != mark) {
                        Field p;
                        ty->x.marked = mark;
                        for (p = ty->u.sym->u.s.flist; p; p = p->link) {
                                fprint(f, "\n%I", indent+1);
                                prtype(p->type, f, indent+1, mark);
                                fprint(f, " %s@%d", p->name, p->offset);
                                if (p->lsb)
                                        fprint(f, ":%d..%d",
                                                fieldsize(p) + fieldright(p), fieldright(p));
                        }
                        fprint(f, "\n%I", indent);
                }
                fprint(f, ")");
                break;
        case ENUM:
                fprint(f, "(%k %d %d [\"%s\"]", ty->op, ty->size, ty->align, ty->u.sym->name);
                if (ty->x.marked != mark) {
                        int i;
                        Symbol *p = ty->u.sym->u.idlist;
                        ty->x.marked = mark;
                        for (i = 0; p[i] != NULL; i++)
                                fprint(f, "%I%s=%d\n", indent+1, p[i]->name, p[i]->u.value);
                }
                fprint(f, ")");
                break;
        case FUNCTION:
                fprint(f, "(%k %d %d ", ty->op, ty->size, ty->align);
                prtype(ty->type, f, indent+1, mark);
                if (ty->u.f.proto) {
                        int i;
                        fprint(f, "\n%I{", indent+1);
                        for (i = 0; ty->u.f.proto[i]; i++) {
                                if (i > 0)
                                        fprint(f, "%I", indent+2);
                                prtype(ty->u.f.proto[i], f, indent+2, mark);
                                fprint(f, "\n");
                        }
                        fprint(f, "%I}", indent+1);
                }
                fprint(f, ")");
                break;
        }
}

/* printtype - print details of type ty on fd */
void printtype(Type ty, int fd) {
        static unsigned mark;
        prtype(ty, fd == 1 ? stdout : stderr, 0, ++mark);
        fprint(fd == 1 ? stdout : stderr, "\n");
}

/* typestring - return ty as C declaration for str, which may be "" */
char *typestring(Type ty, char *str) {
        for ( ; ty; ty = ty->type) {
                Symbol p;
                switch (ty->op) {
                case CONST+VOLATILE:
                        if (isptr(ty->type))
                                str = stringf("%k %k %s", CONST, VOLATILE, str);
                        else
                                return stringf("%k %k %s", CONST, VOLATILE, typestring(ty->type, str));
                        break;
                case CONST: case VOLATILE:
                        if (isptr(ty->type))
                                str = stringf("%k %s", ty->op, str);
                        else
                                return stringf("%k %s", ty->op, typestring(ty->type, str));
                        break;
                case STRUCT: case UNION: case ENUM:
                        assert(ty->u.sym);
                        if ((p = findtype(ty)) != NULL)
                                return *str ? stringf("%s %s", p->name, str) : p->name;
                        if (*ty->u.sym->name >= '1' && *ty->u.sym->name <= '9')
                                warning("unnamed %k in prototype\n", ty->op);
                        if (*str)
                                return stringf("%k %s %s", ty->op, ty->u.sym->name, str);
                        else
                                return stringf("%k %s", ty->op, ty->u.sym->name);
                case VOID: case FLOAT: case INT: case UNSIGNED:
                        return *str ? stringf("%s %s", ty->u.sym->name, str) : ty->u.sym->name;
                case POINTER:
                        if (!ischar(ty->type) && (p = findtype(ty)) != NULL)
                                return *str ? stringf("%s %s", p->name, str) : p->name;
                        str = stringf(isarray(ty->type) || isfunc(ty->type) ? "(*%s)" : "*%s", str);
                        break;
                case FUNCTION:
                        if ((p = findtype(ty)) != NULL)
                                return *str ? stringf("%s %s", p->name, str) : p->name;
                        if (ty->u.f.proto == 0)
                                str = stringf("%s()", str);
                        else if (ty->u.f.proto[0]) {
                                int i;
                                str = stringf("%s(%s", str, typestring(ty->u.f.proto[0], ""));
                                for (i = 1; ty->u.f.proto[i]; i++)
                                        if (ty->u.f.proto[i] == voidtype)
                                                str = stringf("%s, ...", str);
                                        else
                                                str = stringf("%s, %s", str, typestring(ty->u.f.proto[i], ""));
                                str = stringf("%s)", str);
                        } else
                                str = stringf("%s(void)", str);
                        break;
                case ARRAY:
                        if ((p = findtype(ty)) != NULL)
                                return *str ? stringf("%s %s", p->name, str) : p->name;
                        if (ty->type && ty->type->size > 0)
                                str = stringf("%s[%d]", str, ty->size/ty->type->size);
                        else
                                str = stringf("%s[]", str);
                        break;
                default: assert(0);
                }
        }
        assert(0); return 0;
}

